EP4281903A1 - Kartenkörper für eine chipkarte und chipkarte - Google Patents
Kartenkörper für eine chipkarte und chipkarteInfo
- Publication number
- EP4281903A1 EP4281903A1 EP22700705.1A EP22700705A EP4281903A1 EP 4281903 A1 EP4281903 A1 EP 4281903A1 EP 22700705 A EP22700705 A EP 22700705A EP 4281903 A1 EP4281903 A1 EP 4281903A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- area
- slot
- chip
- module
- card
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07745—Mounting details of integrated circuit chips
- G06K19/07747—Mounting details of integrated circuit chips at least one of the integrated circuit chips being mounted as a module
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/02—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the selection of materials, e.g. to avoid wear during transport through the machine
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/04—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the shape
- G06K19/041—Constructional details
- G06K19/042—Constructional details the record carrier having a form factor of a credit card and including a small sized disc, e.g. a CD or DVD
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
- G06K19/07773—Antenna details
- G06K19/07777—Antenna details the antenna being of the inductive type
- G06K19/07779—Antenna details the antenna being of the inductive type the inductive antenna being a coil
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
- G06K19/07773—Antenna details
- G06K19/07794—Antenna details the record carrier comprising a booster or auxiliary antenna in addition to the antenna connected directly to the integrated circuit
Definitions
- the invention relates to a card body for a chip card and a chip card comprising a card body.
- DI dual-interface
- SPS two-coil system
- the chip module is inserted into a cavity or module opening in the card body.
- Such a card works by using a chip module that itself contains a coil (coil-on module). This coil couples to the card body with a metal core. This pairing only works if a slot is included in the metal card body.
- the cavity design has hitherto been selected in such a way that, due to electromagnetic aspects, the largest possible cavity or module opening is selected in order to increase the energy input into the chip module. However, this reduces the mechanical stability of the module.
- a card body for a chip card having a module opening for receiving a chip module with a coil, comprises a metal layer with a slot that extends from an outer edge of the metal layer to the module opening, and a plastic layer on a Side of the metallic layer is applied.
- the module opening here comprises a blind hole cut out in the plastic layer and the metallic layer and an outer area surrounding the blind hole, which is only cut out to a part of the height of the plastic layer in this, with the metallic layer in the outer area at least another slot is provided.
- a basic idea of the present invention is to introduce additional slots or incisions in the outer area of the module opening.
- the other slots bring about a bundling of the magnetic field lines, a reduction in eddy currents and improved coupling of the windings of the coil.
- the metallic layer is present in the outer area, so that formation of the magnetic flux around the individual windings of the coil and also the coupling between the individual windings is suppressed. While there is magnetic coupling between the individual turns in the area of the blind hole, where there is no metal layer, and thus the quality of the coil is increased, the coupling is suppressed in the area of the metal body.
- the formation of the magnetic flux is also compressed and the magnetic flux also generates eddy currents in the metal body. This means that a considerable part of the energy absorbed by the chip card is lost through the generated eddy currents.
- the further slit or slits now make it possible to provide a small module opening so that the module is stable in the card body, but still to implement a high energy input for the small module opening. The greater the energy input, the better the performance of the chip card.
- the additional slit or slits in the corner areas of the module opening enlarge the electrically active surface for energy transmission to a certain extent. At the same time, however, the module opening is not enlarged over the entire area, so that the mechanical stability of the smaller module opening is retained.
- the additional slot or slots in the corner areas of the module opening enable the mechanical design of a smaller module opening with the electrical energy input of a larger module opening.
- the coupling of energy into the metal card is significantly improved, the performance in the chip card increases.
- the additional slots result in a reduction in the eddy currents and an optimization of the magnetic field.
- this enables the magnetic field strength to build up more quickly on a coil of the chip module, which allows the chip or the processor to start up more quickly.
- a higher magnetic field strength is made possible on a coil of the chip module, which allows faster operation due to a higher operating frequency of the chip or the processor.
- additional slots is used to conceptually differentiate these additional slots in the outer area of the module opening from the slot in the metal core, which is used to limit eddy currents. These additional slots are described below in the form of corner slots and parallel slots. Provision can be made for at least one corner slot to extend in a slot area of the outer area, starting from a corner area of the blind hole. These slits starting from the corners enable the previously described field optimization effects.
- One to four corner slits can be provided, with each additional slit extending into the metallic layer from a different corner region of the module opening.
- the energy input can already be increased with a slit. With four preferably symmetrically arranged slots, the energy input can be further increased.
- the at least one corner slot has a length of 1 mm to 2 mm. Measurements have shown that a good energy input can be achieved with such lengths.
- These slots which run parallel to the circumference or the walls of the blind hole or the module opening, enable the field optimization effects described above.
- One to four parallel slots can be provided, with each additional slot extending in the metallic layer in a different wall area of the module opening.
- the energy input can already be increased with just one slit. With four preferably symmetrically arranged slots, the energy input can be further increased.
- the distance between the at least one parallel slot and a wall of the blind hole is between 0.8 mm and 1 mm. It has been shown that this distance offers good energy input in relation to the slot length.
- a further plastic layer is applied to a second side of the metallic layer, opposite the one side, and that the inner area of the module opening extends into the further plastic layer.
- the metallic layer or the metallic core is thus completely broken in the area of the module opening, which improves the electrical conditions, in particular the energy transmission.
- the slit area of the outer area and an unslit area of the outer area are of the same size. This symmetrical arrangement of the two areas has proven to be effective for good energy input.
- a chip card according to the invention comprises a card body as described above and a chip module with a coil that is at least partially embedded in the module opening of the card body.
- the chip module has a base body that carries the coil and that the base body is in the outer region of the module Opening rests on the plastic layer. In this way, direct electrical contact between the chip module and the metallic layer can be avoided in a simple manner.
- the chip module and the card body only communicate with each other via the coils.
- 2/3 of the turns of the coil of the chip module can be used for the energy input.
- 2/3 of a bearing surface of the chip module can be used for a mechanical connection.
- the slot area is used twice, namely electrically for the energy input and mechanically for a stable mounting of the chip module.
- FIG. 1 shows a sectional view of a chip card with card body and chip module
- Fig. 4 a schematic representation of the magnetic flux in a
- Fig. 5 a detail of the module opening of the sectional view of the chip card from Figure 1.
- Fig. 1 shows a card body 10 for a chip card 20.
- the chip card 20 here comprises the card body 10 and a chip module 30.
- the card body 10 comprises a metallic layer 11, for example in the form of a core or a layer of stainless steel alloy with a thickness of 400 ⁇ m.
- a main side or surface of the card body 10 is covered or laminated with a plastic layer 12 .
- An opposite second main side or surface of the card body 10 is covered or laminated with a further plastic layer 13 .
- the two plastic layers 12, 13 can be made of PET, PC, PVC or PP, for example, and have a thickness of 200 ⁇ m.
- the thickness of the card body 10 should not exceed the maximum thickness of a chip card body according to ISO 7810.
- a module opening 14 is recessed in the main face or surface of the card body 10 .
- the module opening 14 extends through the entire plastic layer 12, the entire metallic layer 11 and part of the plastic layer 13.
- the module opening 14 is created, for example, by means of a laser work step or a milling work step.
- the module opening 14 has a blind hole 14a cut out in the plastic layer 12 and the metal layer 11 and an outer area 14b surrounding the blind hole 14a, which is cut out only over part of the height of the plastic layer 12 in the latter.
- the chip module 30 is arranged in the module opening 14 and glued there, for example.
- the chip module 30 includes a base body 31 which carries the coil 32 .
- the base body 31 is in the outer region 14 b of the module opening 14 on the plastic layer 12 .
- the chip module 30 also includes a chip 33 which is fastened to an underside of the base body 31 in a casting compound, for example.
- the chip 33 is supplied with energy and/or signals via the coil 32 .
- An electromagnetic field emerging from the metallic layer 11 can thus be coupled into the coil 32 .
- a card body 10 is shown in plan view.
- a slot 15 is provided in the metallic layer 11 and extends from an outer edge of the metallic layer 11 to the module opening 14 .
- the slot 15 is shown on a left-hand side; the slot 15 can also be arranged on a right-hand side of the card body 10.
- the slot 15 serves to avoid eddy currents.
- the slit 15 has, for example, a width between 30 ⁇ m and 100 ⁇ m, preferably between 50 ⁇ m and 80 ⁇ m.
- the slit 15 serves to prevent eddy currents in the vicinity of the module opening 14 and is therefore formed in the metallic layer 11 .
- the slot 15 is usually formed in the metal layer 11 before it is laminated to the plastic layers 12 and 13 . It is therefore common for the slot 15 to run only in the metallic layer 11 and not in the plastic layers 12 and 13.
- At least one corner slot 16 is provided in the metallic layer 11 and extends, starting from a corner area of the blind hole 14a, into a slot area 14c of the outer area 14b.
- four corner slots 16 are provided, each extending at an angle of 45° to an edge of the module opening 14 .
- Each of the corner slits 16 has a length of 1mm to 2mm.
- At least one parallel slot 17 is further provided in a slot area 14c of the outer area 14b, which extends parallel to a wall of the blind hole 14a.
- a length of the parallel slot 17 corresponds at least to the length of a wall of the blind hole 14a.
- the distance between the parallel slot 17 and a wall of the blind hole 14a is between 0.8 mm and 1 mm.
- four parallel slots 17 are provided, each of which runs parallel to one of the four walls of the blind hole 14a.
- the individual parallel slots 17 and corner slots 16 are formed separately from one another, so that they are not connected to one another outside of the blind hole 14a.
- the parallel slits 17 and corner slits 16 may be formed in any combination. It is thus possible to have only parallel slits 17, only corner slits 16 or both types of slits. For each of the two types of slits, one, two, three or four slits can be provided in the slit region 14c.
- the module opening 14 has dimensions of 8 mm by 9 mm and a depth of approximately 250 ⁇ m.
- FIG. 3 shows a bottom view of the chip module 30 with a central contact area 34 for connecting the chips (not shown here) or an integrated circuit.
- the turns of coil 32 surround contact area 34. In this example, coil 32 has fifteen turns.
- the coil 32 serves to transmit signals and/or to input energy for the chip of the chip module.
- 4 shows a schematic representation of the magnetic flux in a region of the chip module 30.
- the coil 32 is arranged with its individual windings 35 on a module tape 36, for example.
- Fig. 4 shows the course of the magnetic flux 37 around the individual turns 35 of the coil 32. While in the area of the module opening 14 or the blind hole 14a, a magnetic coupling occurs between the individual turns 35 and thus the quality of the coil 32 is increased Area of the metal body suppresses the coupling. The formation of the magnetic flux 37 is also compressed and the magnetic flux 37 also generates eddy currents in the metal body. This means that the energy absorbed is lost through the generated eddy currents.
- the suppressing influence of the metallic layer 11 is eliminated or at least reduced by the parallel slits 17 and/or the corner slits 16 .
- a magnetic coupling between the individual windings 35 takes place here, as a result of which the energy input is increased.
- Fig. 5 shows a detail of the module opening 14 of the sectional view of the chip card 20 from Figure 1. Shown is the module opening 14 in the plastic layer 12, the metallic layer 11 and the plastic layer 13. The module opening 14 has a blind hole 14a and an outer region 14b surrounding the blind hole 14a, which is only part of the height of the plastic layer 12 in this one is excluded.
- a corner slot 16 is shown here in the metallic layer 11, which, starting from a corner area of the blind hole 14a, extends into a slot area 14c of the outer area 14b.
- the corner slot 16 extends at an angle of 45° to an edge of the module opening 14 and has a length of 1 mm to 2 mm.
- a parallel slot also runs in the slot area 14c of the outer area 14b.
- the slit area 14c of the outer area 14b and a remaining, unprotected area of the outer area 14b are of the same size in this example.
- the remaining, unslit area of the outer area 14b surrounds the slit area 14c of the outer area 14b. It has been shown that this arrangement represents a good compromise between mechanical stability and electrical performance of the chip.
- the slot area 14c of the outer area 14b and the remaining, unprotected area of the outer area 14b can be of the same size and the coil 32 can cover the blind hole 14a of the module opening 14, the slot area 14c of the outer area 14b and the remaining, unslotted area of the cover the outer area 14b of the module opening 14 by one third each.
- This arrangement has also been shown to represent a good compromise between mechanical stability and electrical performance of the chip. The performance of the chip and thus of the chip card depends on how quickly a minimum amount of magnetic field strength can be built up at the coil 32 and how quickly this increases.
- the energy input is sufficient for operation of the chip.
- This minimum amount can be, for example, 1.5 amperes per meter (A/m).
- the corner slits 16 and the parallel slits 17 favor the propagation of the electromagnetic field to the coil 32, so that the minimum amount of the magnetic field strength at the coil 32 can be reached quickly.
- the corner slots 16 and the parallel slots 17 reduce the formation of eddy currents, which further improves the energy input into the chip card.
- the increase in magnetic field strength across coil 32 determines when the chip will reach its maximum performance. There is usually a saturation range in which the performance of the chip does not increase further despite increasing magnetic field strength.
- the performance of the chip can be specified, for example, in arithmetic operations per unit of time such as one second.
- the corner slits 16 and the parallel slits 17 promote the increase in the electromagnetic field on the coil 32, since the corner slits 16 and the parallel slits 17 enable better and faster propagation of the electromagnetic field and thus the magnetic field strength on the coil 32 .
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Credit Cards Or The Like (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021000335.7A DE102021000335A1 (de) | 2021-01-22 | 2021-01-22 | Kartenkörper für eine Chipkarte und Chipkarte |
| PCT/EP2022/025018 WO2022157003A1 (de) | 2021-01-22 | 2022-01-19 | Kartenkörper für eine chipkarte und chipkarte |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4281903A1 true EP4281903A1 (de) | 2023-11-29 |
| EP4281903B1 EP4281903B1 (de) | 2025-03-05 |
Family
ID=80035220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22700705.1A Active EP4281903B1 (de) | 2021-01-22 | 2022-01-19 | Kartenkörper für eine chipkarte und chipkarte |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US12265872B2 (de) |
| EP (1) | EP4281903B1 (de) |
| DE (1) | DE102021000335A1 (de) |
| WO (1) | WO2022157003A1 (de) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11354558B2 (en) | 2013-01-18 | 2022-06-07 | Amatech Group Limited | Contactless smartcards with coupling frames |
| WO2016106251A2 (en) | 2014-12-23 | 2016-06-30 | Composecure, Llc | Smart metal card with radio frequency (rf) transmission capability |
| CN204463191U (zh) | 2015-02-12 | 2015-07-08 | 上海卡美循环技术有限公司 | 金属类智能卡 |
| DE102016107982A1 (de) | 2016-04-29 | 2017-11-02 | Infineon Technologies Ag | Chipkartenmodul, Chipkarte und Verfahren zum Bilden eines Chipkartenmoduls |
| US10762412B2 (en) | 2018-01-30 | 2020-09-01 | Composecure, Llc | DI capacitive embedded metal card |
-
2021
- 2021-01-22 DE DE102021000335.7A patent/DE102021000335A1/de active Pending
-
2022
- 2022-01-19 WO PCT/EP2022/025018 patent/WO2022157003A1/de not_active Ceased
- 2022-01-19 EP EP22700705.1A patent/EP4281903B1/de active Active
- 2022-01-19 US US18/261,370 patent/US12265872B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| US12265872B2 (en) | 2025-04-01 |
| EP4281903B1 (de) | 2025-03-05 |
| WO2022157003A1 (de) | 2022-07-28 |
| DE102021000335A1 (de) | 2022-07-28 |
| US20240303457A1 (en) | 2024-09-12 |
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